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Cancún

Cheap flights from St. Louis (STL) to Cancún (CUN) - Compare and Save

STL — CUN
Jun 23 — Jun 306
Mon 6/23
Mon 6/30
6 travelers, Economy
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Cheapflights Tip: The best prices from Lambert-St Louis to Cancun are usually found in April or January, booked 87 days in advance, depart on a Tuesday or Wednesday and return on a Sunday

Cheap flight deals from St. Louis to Cancún

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Cancún (CUN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated June 18, 2025.

Round-trip from

$265
(Cheapflightsfares)

One-way from

$118
(FlightHub)

Popular in

March

Cheapest in

April

Average price

$560

Good round-trip deal

$300 or less

Good one-way deal

$296 or less
From Lambert-St Louis to Cancun
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One-way flight from Lambert-St Louis to Cancun
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Highest demand for flights based on searches. 1% potential increase in price ($9 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($13 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Price to beat on a round-trip flight from Lambert-St Louis to Cancun.
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Price to beat on a one-way flight from Lambert-St Louis to Cancun.
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Find flight deals from St. Louis to Cancún

Cheapest flights from St. Louis to Cancún
Explore the most affordable flight options available from St. Louis to Cancún. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 18, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/217:37 pmSTL - CUN
1 stop15h 56mSpirit Airlines
Thu 9/259:31 amCUN - STL
1 stop9h 01mSpirit Airlines
Deal found 6/17$265
This Cheapflightsfares deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/147:37 pmSTL - CUN
1 stop15h 56mSpirit Airlines
Sun 9/219:31 amCUN - STL
1 stop9h 01mSpirit Airlines
Deal found 6/17$289
This Priceline deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/66:36 pmSTL - CUN
1 stop14h 19mMultiple Airlines
Thu 7/1010:47 amCUN - STL
1 stop8h 36mMultiple Airlines
Deal found 6/16$290
This CheapOair deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/46:36 pmSTL - CUN
1 stop14h 19mSpirit Airlines
Tue 7/89:13 amCUN - STL
1 stop25h 16mSpirit Airlines
Deal found 6/16$297
This Mytrip deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/217:37 pmSTL - CUN
1 stop15h 56mSpirit Airlines
Thu 9/259:10 amCUN - STL
2 stops22h 39mSpirit Airlines
Deal found 6/17$301
This FlightHub deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/135:26 pmSTL - CUN
1 stop17h 54mSpirit Airlines
Thu 7/179:50 amCUN - STL
1 stop24h 02mSpirit Airlines
Deal found 6/16$303
This Mytrip deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/66:36 pmSTL - CUN
1 stop14h 19mSpirit Airlines
Thu 7/1012:26 pmCUN - STL
2 stops21h 26mSpirit Airlines
Deal found 6/16$304
This CheapOair deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/123:34 pmSTL - CUN
1 stop19h 46mSpirit Airlines
Tue 7/159:13 amCUN - STL
1 stop25h 16mSpirit Airlines
Deal found 6/17$309
This Cheapflightsfares deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/226:36 pmSTL - CUN
1 stop14h 19mSpirit Airlines
Thu 6/2610:00 amCUN - STL
1 stop7h 04mSpirit Airlines
Deal found 6/17$311
This Mytrip deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/66:36 pmSTL - CUN
1 stop14h 19mSpirit Airlines
Thu 7/109:50 amCUN - STL
1 stop24h 02mSpirit Airlines
Deal found 6/15$313
This FlightHub deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/711:28 amSTL - CUN
1 stop20h 35mSpirit Airlines
Wed 7/912:26 pmCUN - STL
1 stop28h 05mSpirit Airlines
Deal found 6/17$314
This FlightHub deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/182:27 pmSTL - CUN
1 stop18h 06mSpirit Airlines
Sat 8/239:28 amCUN - STL
1 stop28h 04mSpirit Airlines
Deal found 6/16$315

Cheapflights Fare Finder

Customize your flight search to find flights from St. Louis to Cancún that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 18, 2025.
Use the filters below to find and compare flights from St. Louis to Cancún that are best for you.

Fly from

St. Louis

Fly to

Cancún

Route

Depart

Return

Price

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Sun 9/14

7:37 pm-11:33 am

1 stop15h 56m

Cancun

Sun 9/21

9:31 am-6:32 pm

1 stop9h 01m

$289

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Sun 7/6

6:36 pm-8:55 am

1 stop14h 19m

Cancun

Thu 7/10

10:47 am-7:23 pm

1 stop8h 36m

$290

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Fri 7/4

6:36 pm-8:55 am

1 stop14h 19m

Cancun

Tue 7/8

9:13 am-10:29 am

1 stop25h 16m

$297

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Sun 7/13

5:26 pm-11:20 am

1 stop17h 54m

Cancun

Thu 7/17

9:50 am-9:52 am

1 stop24h 02m

$303

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Sun 7/6

6:36 pm-8:55 am

1 stop14h 19m

Cancun

Thu 7/10

12:26 pm-9:52 am

2 stops21h 26m

$304

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Sat 7/12

3:34 pm-11:20 am

1 stop19h 46m

Cancun

Tue 7/15

9:13 am-10:29 am

1 stop25h 16m

$309

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Sun 6/22

6:36 pm-8:55 am

1 stop14h 19m

Cancun

Thu 6/26

10:00 am-5:04 pm

1 stop7h 04m

$311

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Sun 7/6

6:36 pm-8:55 am

1 stop14h 19m

Cancun

Thu 7/10

9:50 am-9:52 am

1 stop24h 02m

$313

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Mon 7/7

11:28 am-8:03 am

1 stop20h 35m

Cancun

Wed 7/9

12:26 pm-4:31 pm

1 stop28h 05m

$314

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Sun 7/6

6:36 pm-8:55 am

1 stop14h 19m

Cancun

Thu 7/10

12:37 pm-3:54 pm

Nonstop3h 17m

$338

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/18

Showing 1-10 of 60 results
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Best time to book a flight from St. Louis to Cancún

Have a flexible travel schedule? Discover the best time to fly to Cancún from St. Louis with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Cancún

How far ahead should I book a flight from St. Louis to Cancún?

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Cancún. Price data was last updated on June 13, 2025.

The price you pay for your flight from St. Louis to Cancún may vary depending on when you book. For the best chance of a lower fare, look to book 87 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from St. Louis to Cancún?

Currently, January is the cheapest month in which you can book a flight from St. Louis to Cancún (average of $360). Flying from St. Louis to Cancún in March is currently the most expensive (average of $492). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from STL to CUN?

Find hourly flight availability from St. Louis to Cancún. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 18, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 57% on flights from St. Louis to Cancún by exploring options for tickets in the afternoon.

What is the cheapest day to fly from St. Louis to Cancún?

Use this chart to determine the cheapest time to fly round-trip from St. Louis to Cancún. Price data was last updated on June 15, 2025.

Travelers seeking maximum savings on their St. Louis to Cancún flight should consider departing on Thursday evenings when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from St. Louis to Cancún

Explore weekly flight availability from St. Louis to Cancún. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated June 18, 2025.

The most flights from STL to CUN are scheduled on a Monday (3 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (1 on average).

Rainfall in Cancún by month

Plan your trip to Cancún by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Cancún ranges from 1.1 - 11.1 inches per month. October is typically the wettest month, when rainfall can reach 11.1 in. April is typically the driest time to visit Cancún when rainfall is around 1.1 in.

Temperature in Cancún by month

Plan your trip to Cancún by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Cancún, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 86.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 75.2 F).

Reviews of airlines servicing Cancún

Get insights into the airlines that provide service to Cancún. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Cancún. Reviews last updated June 18, 2025.
Get a feel of what it's like to fly with Alaska Airlines, Southwest and Delta from St. Louis to Cancún by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Food

7.1

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Food

7.1

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
Southwest
8.0
Very good
4,280 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Food

7.1

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
Delta
8.0
Very good
7,965 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Food

7.1

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
Aeromexico
7.5
Good
1,714 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Food

7.1

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
United Airlines
7.4
Good
8,809 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Food

7.1

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Cancún. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airports do I use to fly from St. Louis to Cancún?

    Booking a flight from Lambert-St Louis (STL) to Cancun (CUN) is your only option if you wish to fly from St. Louis to Cancún. On a typical day, there are 2 flights from Lambert-St Louis to Cancun, all of which are around 3h 10m for a nonstop flight. You can also purchase a plane ticket from 8 airlines when you book a flight from Lambert-St Louis to Cancún.

  • How popular is this St. Louis to Cancún flight route?

    Within the past month, 21 users have taken a look at flights from Lambert-St Louis to Cancun.

  • What is the cheapest airline to fly from St. Louis to Cancún round-trip?

    Our cheapest airline available from St. Louis to Cancún is Spirit Airlines. Our recent data shows that you can find tickets from as low as $265 on this airline. Spirit Airlines is 49% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest flights from St. Louis to Cancún?

    Looking at all options, your cheapest flight can be booked for $171. While the most popular route (Lambert-St Louis - Cancun) can be booked for $265 on average our data indicates $320 when flying from St. Louis to Cancún.

  • Can I find deals for flights from St. Louis to Cancún that include hotel bookings?

    Yes. In addition to deals on St. Louis to Cancún flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Cancún?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Cancún.

  • Can I find deals for business class flights from St. Louis to Cancún?

    Yes. Cheapflights offers flight deals from St. Louis to Cancún by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from St. Louis to Cancún?

    Currently, January is the cheapest month in which you can book a flight from St. Louis to Cancún (average of $360). Flying from St. Louis to Cancún in March is currently the most expensive (average of $492). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Puerto Aventuras
Holbox
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Top 8 airlines flying from St. Louis to Cancún

Discover the top 8 airlines that operate flights from St. Louis to Cancún. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$130Average$293FlexibilityNo cancel feeOn-time65%
VolarisCheapest$175Average$372FlexibilityNo cancel feeOn-time79%
FrontierCheapest$291Average$486FlexibilityNo cancel feeOn-time62%
AeromexicoCheapest$346Average$496FlexibilityNo cancel feeOn-timeN/A
DeltaCheapest$358Average$557FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$447Average$601FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$449Average$580FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$519Average$673FlexibilityNo cancel feeOn-time63%

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